centerX {drgee}

Cluster-center a design matrix around cluster means

Description

Given a design matrix and a cluster identification variable. A new design matrix is returned, where each column is centered around its cluster mean. Using C++ code for speed.

Usage

centerX(x, id)

Arguments

x

A design matrix

id

A cluster identifying variable.

Details

centerX is written as a help function with the aim of being fast.

Value

A matrix with cluster centered columns.

Author(s)

Johan Zetterqvist, Arvid Sjölander